Export your current Mint database using a tool like PhpMyAdmin (make sure you get both tables, mint__config and mint_visit, plus any tables that might have been created by third-party Pepper). If you use mysqldump to export your database be careful, the newer versions will not retain auto_increment columns (required for Mint to work correctly). I have not discovered a solution to this problem yet.

Import the Mint database into your new database (again, using PhpMyAdmin)

Upload Mint to the new server (don’t forget to update /mint/config/db.php with your new database connection settings or copy over any additional Pepper you’ve installed) and visit /mint/?moved to let Mint know that it has been moved so it can get its bearings on the new server.